Gas burner



FIG. 1 is a perspective view of a gas burner;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a left side elevation view thereof; and,

FIG. 5 is a top plan view thereof. 

CLAIM The ornamental design for a gas burner, as shown and described. 